Object : Estimation of EPA

 

          Lush gave the formula for calculation of EPA of a production trait as under      

                  nr
EPA=m + -----------(xbar-m)
                 1+(n-1)r
Where:-         
m = Herd average
n = Number of lactations
r = repeatability
xbar  = Average of all the lactations   of    i^th animal

 

          The animal which produces less than average MPPA or below a certain level of MPPA is culled from the herd.

 

GHAIEPA

 

INPUT File      : Any text file

 

INPUT DATA

 

1.   1st  record        : Heading (20A.4)

2. Data Data in following format

a.       Cow No.                      :           1-4

b.      Date of birth                 :           5-12

c.       Sire No.                       :           13-20

d.      Breed of Sire                :           21-       22

e.       Dam No.                      :           23-26

f.        Breed of Dam               :           27-28

g.       Date of 1st calving        :           29-36 (ddmmyyyy)

h.       Date of last calving        :           37-44

i.         Lactation wise milk yield in the format of 14i4: 45-48,49-52………..

 

 

Object : Estimation of EPD

 

 

          In order to select the young bulls/ male calves for putting under progeny – test, it is essential that they are selected on the basis of some scientific index based on genetic principles. For sex-limited trait like milk yield, the male calves are selected based o information on dam’s and paternal grand-dam’s performance and accordingly expected predicted  difference (EPD) for young bulls/ male calves is computed. EPD is the measure of the deviation of the index (based on dam’s performance, paternal grand-dam’s performance and    paternal   half-sib performance)

from the mean of the population.       

 

GHAIEPD

 

INPUT File      : Any text file

 

Breed code:     

01-Sahiwal

02-Tharparkar

03-Redsindhi

04-Karan Swiss

05-Karan Fries

06-Murrah

07-Holstien

08-BrownSwiss

 

INPUT DATA

 

1st  record  : Heading (20A.4)

2nd record :

a.   Heritability.       :           1-4

b.   Repeatability     :           5-8

3. m                     

01-Sahiwal       :           9-12

02-Tharparkar              13-16

03-Redsindhi                17-20

04-Karan Swiss           21-24

05-Karan Fries 25-28

06-Murrah                   29-32

07-Holstien                  33-36

08-BrownSwiss            37-40

    3rd record

1.      Calf No.

2.      Breed Code

3.      Date of birth     :           5-12

4.      Sire No.           :           13-20

5.      Breed code      :           21-       22

6.      Dam No.          :           23-26

7.      Breed code      :           27-28

8.      Grand dam No.

9.      Breed code

10.  Dam’s best yield

 

4th record :Grand dam’s lactation wise milk yield in the format of (50x, 25I4)

 

5th record :1st lactation milk yield of paternal half-sib in the format of    50x,25I4)

 

Repeat 3rd to 5th records for all male calves. If yield of paternal grand dam or paternal half sibs are not available leave 3rd to 5th records blank.